The German growing area Franconia used to be in the three areas Maindreieck, Mainviereck and Steigerwald with 23 large layers and 216 individual layers. In November 2011 a new regulation was decided by the members of the Franconian Wine Association. The three old areas will be replaced by 12 much smaller ones. In the medium to long term, these will also replace the 23 large locations. The old areas once played a role in the predominant marketing of Franconian table wine, which they had lost for a long time. Before this change, the following description applied to the Mainviereck area:
The very small Mainviereck area is in the west and only comprises around 330 hectares of vineyards. He is after that by the curving barrel of the Mains formed landscape in the form of a quadrangle open to the north with the communities forming the corner points named Gemünden, Wertheim, Miltenberg and Aschaffenburg. Primitive rock floors with mica slate, quartzite and gneiss predominate here. The most common varieties are Müller-Thurgau. Riesling. Sylvaner and Bacchus, The area is divided into two major locations: Heiligenthal and Reuschenberg divided.